AstraZeneca pauses clinical trial of COVID-19 vaccine.

Drugmaker AstraZeneca paused its clinical trial of a COVID-19 vaccine to investigate a possible severe adverse reaction in one of the participants. This comes as the U.S. death toll from the coronavirus nears 190,000. CBS News' Elise Preston reports on the latest developments, and Dr. Neeta Ogden, an internal medicine doctor and immunologist, joined CBSN to discuss what it all means.

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